For the dev board, the TX/RX pins on the tuner connector will be needed. So let's leave those intact. Also, the empeg has 5V available internally, so if we feed that out the tuner connector, then there's no need for any extra voltage conversions.
Code:
1 - Pink - level
2 - Grey - signal
3 - Blue - Power Ant (not connected on wiring harness)
4 - Black - 0v
5 - Brown - TX (from tuner)
6 - Red - RX
7 - Purple - no connection (not used in PCATS tuner nor in factory tuner)
8 - Blue - 12v


So, referencing the above, pins 1,2,3,7 are all available for our use.
We should keep 4 (GND), 5(TX from tuner), and 5(RX to tuner).

There are enough leftover pins to use one of the remaining pins for +5V in addition to keeping +12V, and still have three pins for I2S (SCK,WS,SDIN).

So, how about you decide the final assignments within those constraints?
If for some reason we end up needing another pin, then we could put +5V in place of the +12V on pin 8.





Edited by mlord (26/11/2017 01:21)